Thanks for writing in.
Its amazing to know that you are off cigarettes for last 6 months and the fact that you have smoked for 20 years.
As of now, e cigarettes are being improvised every day and we are looking forward to real harmless ones very soon.
If your chest X ray
is normal and you do not suffer from any major respiratory problems, half the problem of you having smoked for last 20 years is answered.
I would suggest you to be optimistic and firm in your decision to end cigarette smoking
and spread the word around your community and loved ones.